Electro-Chemical Devices (ECD) T80 - Manual (Page 28)

3.3 START UP GUIDE
Install and wire the T80 Transmitter as described in Sections 2.1 and 2.2 above.
Connect the sensor to the transmitter as described in Section 2.2 above.
Supply power to the Model T80 transmitter.
Verify the proper measurement type is displayed, pH, ORP or Ion. The sensor automatically uploads the
measured parameter, the calibration data and the range of measurement to the transmitter. The default
configuration of the 4-20 mA output is the range of the sensor, 0-14 pH for pH sensors, -1500 - +1500 for ORP or
0-XXXX ppm for a pIon Sensor. To change the 4-20 mA range, follow the instructions in Section 3.3.1 below.
3.3.1 C
ONFIGURE
4-20
M
A
OUTPUT RANGE
 Double press any key except the HOME key to enter the HOME Menu. Follow the path below to set the
4-20 mA range.
 HOME Menu → Press CONFIG → XMTR → OUTPUT → 4-20 (1)(2) → PV or
TEMP
 Press CHANGE to enter New Values.
 Choose 4 mA value, press OK
 Enter value using ▲ or ▼and NEXT to move to the next digit, press OK→Back
 Choose 20 mA value, press OK,
 Enter value using ▲ or ▼and NEXT to move to the next digit, press OK→Back
 Press BACK to return to the CONFIGURE 4-20 mA screen or HOME to return to
the HOME Menu screen.
3.3.2 C
ONFIGURE
4-20
M
A F
AULT
C
ONDITION AND
C
AL
 In the CONFIGURE 4-20 mA screen, Press MORE → FAULT or
 Choose Low Fault 3.5 mA or Hi Fault 22 mA or NONE, (default setting NONE),
Press OK
 Press BACK → CAL, connect DVM to 4-20 mA line, Press 4.00 mA then adjust value to the DVM reading,
Press 20.00 mA and adjust value to the DVM reading. The 4-20 mA output is calibrated.
3.3.3 C
ONFIGURE
A
LARM
R
ELAYS
(R
ELAYS
O
PTIONAL
)
 HOME Menu → Press CONFIG → XMTR → OUTPUT → RELAYS→RLY1
 Choose the ALARM, TIMER, FAULT or DISABLE mode for Relay 1
 ALARM Displays:
o
SET POINT ON: The Process Variable Value that activates the relay.
o
EXPIRATION: Enter a time that should not be exceeded before the PV should have changed
enough to activate the OFF set point. At the Expiration time the relay is deactivated and a Fault
condition is initiated. Fault: Relay 1 Time expired: Cause: Loss of reagent, failed sensor ….
o
Delay ON: The amount of time the PV must remain above/below the set point before the relay
activates.
o
SET POINT OFF: The Value of the process variable that deactivates
the relay.
 SET POINT OFF > Set Point → Low Set Point
 SET POINT OFF < Set Point → Hi Set Point
Page 27 Model T80